Add infrastructure to keep track of references to prototypes.

src/factory.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/conversions.h"
 #include "src/isolate-inl.h"
@@ skipping 98 matching lines @@
     Handle<FixedDoubleArray> double_array =
         Handle<FixedDoubleArray>::cast(array);
     for (int i = 0; i < size; ++i) {
       double_array->set_the_hole(i);
     }
   }
   return array;
 }
 
 
+Handle<WeakFixedArray> Factory::NewWeakFixedArray(int size) {
+  DCHECK(0 <= size);
+  size += WeakFixedArray::kReservedFieldCount;
+  CALL_HEAP_FUNCTION(isolate(), isolate()->heap()->AllocateFixedArrayWithFiller(
+                                    size, NOT_TENURED, Smi::FromInt(0)),
+                     WeakFixedArray);
+}
+
+
 Handle<ConstantPoolArray> Factory::NewConstantPoolArray(
     const ConstantPoolArray::NumberOfEntries& small) {
   DCHECK(small.total_count() > 0);
   CALL_HEAP_FUNCTION(
       isolate(),
       isolate()->heap()->AllocateConstantPoolArray(small),
       ConstantPoolArray);
 }
 
 
@@ skipping 1741 matching lines @@
   return obj;
 }
 
 
 Handle<JSProxy> Factory::NewJSProxy(Handle<Object> handler,
                                     Handle<Object> prototype) {
   // Allocate map.
   // TODO(rossberg): Once we optimize proxies, think about a scheme to share
   // maps. Will probably depend on the identity of the handler object, too.
   Handle<Map> map = NewMap(JS_PROXY_TYPE, JSProxy::kSize);
-  map->set_prototype(*prototype);
+  map->SetPrototype(prototype);
 
   // Allocate the proxy object.
   Handle<JSProxy> result = New<JSProxy>(map, NEW_SPACE);
   result->InitializeBody(map->instance_size(), Smi::FromInt(0));
   result->set_handler(*handler);
   result->set_hash(*undefined_value(), SKIP_WRITE_BARRIER);
   return result;
 }
 
 
 Handle<JSProxy> Factory::NewJSFunctionProxy(Handle<Object> handler,
                                             Handle<Object> call_trap,
                                             Handle<Object> construct_trap,
                                             Handle<Object> prototype) {
   // Allocate map.
   // TODO(rossberg): Once we optimize proxies, think about a scheme to share
   // maps. Will probably depend on the identity of the handler object, too.
   Handle<Map> map = NewMap(JS_FUNCTION_PROXY_TYPE, JSFunctionProxy::kSize);
-  map->set_prototype(*prototype);
+  map->SetPrototype(prototype);
 
   // Allocate the proxy object.
   Handle<JSFunctionProxy> result = New<JSFunctionProxy>(map, NEW_SPACE);
   result->InitializeBody(map->instance_size(), Smi::FromInt(0));
   result->set_handler(*handler);
   result->set_hash(*undefined_value(), SKIP_WRITE_BARRIER);
   result->set_call_trap(*call_trap);
   result->set_construct_trap(*construct_trap);
   return result;
 }
 
 
 void Factory::ReinitializeJSProxy(Handle<JSProxy> proxy, InstanceType type,
                                   int size) {
   DCHECK(type == JS_OBJECT_TYPE || type == JS_FUNCTION_TYPE);
 
   // Allocate fresh map.
   // TODO(rossberg): Once we optimize proxies, cache these maps.
   Handle<Map> map = NewMap(type, size);
 
   // Check that the receiver has at least the size of the fresh object.
   int size_difference = proxy->map()->instance_size() - map->instance_size();
   DCHECK(size_difference >= 0);
 
-  map->set_prototype(proxy->map()->prototype());
+  map->SetPrototype(handle(proxy->map()->prototype(), proxy->GetIsolate()));
 
   // Allocate the backing storage for the properties.
   int prop_size = map->InitialPropertiesLength();
   Handle<FixedArray> properties = NewFixedArray(prop_size, TENURED);
 
   Heap* heap = isolate()->heap();
   MaybeHandle<SharedFunctionInfo> shared;
   if (type == JS_FUNCTION_TYPE) {
     OneByteStringKey key(STATIC_CHAR_VECTOR("<freezing call trap>"),
                          heap->HashSeed());
@@ skipping 585 matching lines @@
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 } }  // namespace v8::internal